CN103386595A - High-temperature roll-forming processing method of gear hob - Google Patents

Abstract

The invention discloses a high-temperature roll-forming processing method of a gear hob, which belongs to the technical field of forming and processing a cutting tool. The high-temperature roll-forming processing method is used for carrying out high-temperature rolling on a raw-material high-speed tool and comprises the specific technology steps of (1) baiting, (2) heating, (3) rolling, (4) low-temperature annealing, (5) cutting, (6) surface processing and (7) quenching. According to the high-temperature roll-forming processing method of the gear hob, disclosed by the invention, the utilization rate of raw materials is greatly increased, and the high-temperature roll-forming processing method has the advantages of low production cost and high production efficiency.

Description

The high temperature rolling forming and machining method of gear hob

Technical field

The invention belongs to the technical field that a kind of cutting element is shaped and processes, be specifically related to a kind of forming and machining method of gear hob.

Background technology

Gear hob is a kind of common cutter for gear wheel, the shaping by stock removal method is adopted in the shaping of gear hob processing at present mostly, take high-speed tool steel as raw material, pass through blanking, turning, milling, heat treatment, grinding, put the first edge on a knife or a pair of scissors and blanking procedure, obtain the gear hob finished product.But there is following technical problem in the method: the raw material high-speed tool steel directly carries out turning and milling to obtain the thick product of gear hob, this process can produce a large amount of tool steel leftover bits and pieces, as everyone knows, price of steel product is always high, in the controlled working process, the generation of tool steel leftover bits and pieces is a key factor of control gear hobboing cutter production cost, so the production cost of the method is higher; This processing method is from the raw material high-speed tool steel to the finished product gear hob, and especially turning and milling belong to steel cold working, and difficulty of processing is large, causes the process-cycle that is shaped long, generally needs 45 days, and production efficiency is lower.

Summary of the invention

The invention provides a kind of high temperature rolling forming and machining method of gear hob, the problem that production cost is high, production efficiency is low that exists to solve prior art.

The technical solution adopted for the present invention to solve the technical problems is that the raw material high-speed tool steel is carried out high temperature rolling, and its concrete steps are as follows:

(1) blanking: use sawing machine to foreign round diameter at the raw material high-speed tool steel cutting die of 150-250mm;

(2) heat up: the tool steel that in refractory-lined ovens, step (1) is obtained heats up, and temperature rises between 950-1050 ℃;

(3) rolling: use milling train to be rolled tool steel, obtain thick product;

(4) insulation annealing: the thick product temperature that in holding furnace, step (3) is obtained is controlled at 860 ℃ of left and right, keeps 4 hours, then cools the temperature to 350 ℃ of left and right in 4 hours, comes out of the stove to place to be cooled to normal temperature;

(5) cut off: according to the length of the gear hob of customer requirement, thick product is cut off;

(6) surface treatment: turning and milling are carried out in the gear hob surface that step (5) obtains, make it smooth smooth;

(7) quench: the gear hob that step (6) was processed quenches, and, to improve intensity, wearability, fatigue strength and the toughness of gear hob, obtains finally the gear hob finished product, and the module of gear hob is at 10-30.

The preferred M2 high-speed tool steel of above-mentioned raw material high-speed tool steel.

Good effect of the present invention is: by the raw material high-speed tool steel is heated up, and at high temperature be rolled, under high temperature, steel have higher ductility, and the tool steel leftover bits and pieces that this process produces is considerably less, greatly improve the utilization rate of raw steel, reduced production cost; At high temperature tool steel is easy to shape, and has reduced the difficulty of processing of tool steel, has shortened the process-cycle of gear hob, and than 45 day process-cycle of existing processing technology, this processing method can foreshorten to the process-cycle 10 days.

Specific embodiment

The present invention is further described below in conjunction with specific embodiment.

Take the M2 high-speed tool steel as raw material, raw material is carried out high temperature rolling, its concrete grammar is as follows:

(1) blanking: use sawing machine to foreign round diameter at the raw material high-speed tool steel cutting die of 200mm;

(2) heat up: the tool steel that in refractory-lined ovens, step (1) is obtained heats up, and temperature rises to 990 ℃ of left and right;

(3) rolling: use milling train to be rolled tool steel, obtain thick product;

(4) insulation annealing: the thick product temperature that in holding furnace, step (3) is obtained is controlled at 860 ℃ of left and right, keeps 4 hours, then cools the temperature to 350 ℃ of left and right in 4 hours, comes out of the stove to place to be cooled to normal temperature;

(5) cut off: according to the length of the gear hob of customer requirement, thick product is cut off;

(6) surface treatment: turning and milling are carried out in the gear hob surface that step (5) obtains, make it smooth smooth;

(7) quench: the gear hob that step (6) was processed quenches, and, to improve intensity, wearability, fatigue strength and the toughness of gear hob, obtains finally the gear hob finished product of module 15.

Claims (2)

1. the high temperature rolling forming and machining method of a gear hob, is characterized in that the raw material high-speed tool steel is carried out high temperature rolling, and its concrete steps are as follows:

(1) blanking: use sawing machine to foreign round diameter at the raw material high-speed tool steel cutting die of 150-250mm;

(2) heat up: the tool steel that in refractory-lined ovens, step (1) is obtained heats up, and temperature rises between 950-1050 ℃;

(3) rolling: use milling train to be rolled tool steel, obtain thick product;

(4) insulation annealing: the thick product temperature that in holding furnace, step (3) is obtained is controlled at 860 ℃ of left and right, keeps 4 hours, then cools the temperature to 350 ℃ of left and right in 4 hours, comes out of the stove to place to be cooled to normal temperature;

(5) cut off: according to the length of the gear hob of customer requirement, thick product is cut off;

(6) surface treatment: turning and milling are carried out in the gear hob surface that step (5) obtains, make it smooth smooth;

(7) quench: the gear hob that step (6) was processed quenches, and, to improve intensity, wearability, fatigue strength and the toughness of gear hob, obtains finally the gear hob finished product, and the module of gear hob is at 10-30.

2. the high temperature rolling forming and machining method of gear hob according to claim 1, is characterized in that the raw material high-speed tool steel is the M2 high-speed tool steel.